WO2021048990A1 - Terminal - Google Patents

Terminal Download PDF

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Publication number
WO2021048990A1
WO2021048990A1 PCT/JP2019/035984 JP2019035984W WO2021048990A1 WO 2021048990 A1 WO2021048990 A1 WO 2021048990A1 JP 2019035984 W JP2019035984 W JP 2019035984W WO 2021048990 A1 WO2021048990 A1 WO 2021048990A1
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WO
WIPO (PCT)
Prior art keywords
terminal
csi
base station
csi report
harq
Prior art date
Application number
PCT/JP2019/035984
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English (en)
Japanese (ja)
Inventor
翔平 吉岡
聡 永田
Original Assignee
株式会社Ｎｔｔドコモ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to JP2021545061A priority Critical patent/JP7394861B2/ja
Priority to CN201980100170.8A priority patent/CN114375591A/zh
Priority to PCT/JP2019/035984 priority patent/WO2021048990A1/fr
Priority to EP19945261.6A priority patent/EP4030814A4/fr
Priority to US17/637,397 priority patent/US20220287044A1/en
Priority to AU2019466108A priority patent/AU2019466108A1/en
Publication of WO2021048990A1 publication Critical patent/WO2021048990A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1664—Details of the supervisory signal the supervisory signal being transmitted together with payload signals; piggybacking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present invention relates to a terminal in a wireless communication system.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution Advanced
  • NR New Radio
  • 5G New Radio
  • Non-Patent Document 1 Non-Patent Document 1
  • D2D reduces the traffic between the terminal and the base station, and enables communication between the terminals even if the base station becomes unable to communicate in the event of a disaster or the like.
  • D2D is referred to as "sidelink", but in the present specification, D2D, which is a more general term, is used. However, in the description of the embodiment described later, a side link is also used if necessary.
  • D2D communication includes D2D discovery (also called D2D discovery) for discovering other terminals that can communicate, and D2D communication (D2D direct communication, D2D communication, direct communication between terminals) for direct communication between terminals. It is also roughly divided into communication, etc.).
  • D2D communication, D2D discovery, etc. are not particularly distinguished, they are simply referred to as D2D.
  • a signal transmitted / received in D2D is called a D2D signal.
  • Various use cases of services related to V2X (Vehicle to Everything) in NR are being studied (for example, Non-Patent Document 2).
  • the present invention has been made in view of the above points, and an object of the present invention is to determine retransmission control according to a communication situation in direct communication between terminals.
  • a transmitter that transmits a CSI (Channel State Information) request and a reference signal used for CSI measurement to another terminal, and a CSI report based on the measurement result of the reference signal are received from the other terminal.
  • a terminal having a receiving unit for performing the CSI report and a control unit for determining control related to a HARQ (Hybrid automatic repeat request) response corresponding to the CSI report according to a communication status.
  • HARQ Hybrid automatic repeat request
  • retransmission control in direct communication between terminals, retransmission control can be determined according to the communication status.
  • V2X It is a figure for demonstrating V2X. It is a figure for demonstrating the example (1) of the transmission mode of V2X. It is a figure for demonstrating the example (2) of the transmission mode of V2X. It is a figure for demonstrating the example (3) of the transmission mode of V2X. It is a figure for demonstrating the example (4) of the transmission mode of V2X. It is a figure for demonstrating the example (5) of the transmission mode of V2X. It is a figure for demonstrating the example (1) of the communication type of V2X. It is a figure for demonstrating the example (2) of the communication type of V2X. It is a figure for demonstrating the example (3) of the communication type of V2X.
  • LTE Long Term Evolution
  • NR Universal Terrestrial Radio Access
  • LAN Local Area Network
  • the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or other system (for example, Flexible Duplex, etc.). Method may be used.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • Method may be used.
  • "configuring" the radio parameter or the like may mean that a predetermined value is set in advance (Pre-configure), or the base station 10 or The radio parameter notified from the terminal 20 may be set.
  • FIG. 1 is a diagram for explaining V2X.
  • V2X Vehicle to Everything
  • eV2X enhanced V2X
  • FIG. 1 V2X is a part of ITS (Intelligent Transport Systems), V2V (Vehicle to Vehicle) which means a communication mode between vehicles, and a roadside installed between a vehicle and a roadside.
  • ITS Intelligent Transport Systems
  • V2V Vehicle to Vehicle
  • V2I Vehicle to Infrastructure
  • V2N Vehicle to Network
  • V2P Vehicle to Pedestrian
  • V2X using LTE or NR cellular communication and terminal-to-terminal communication is being studied.
  • V2X using cellular communication is also referred to as cellular V2X.
  • NR V2X studies are underway to realize large capacity, low delay, high reliability, and Quality of Service (QoS) control.
  • LTE or NR V2X it is expected that studies not limited to 3GPP specifications will be promoted in the future. For example, ensuring interoperability, reducing costs by implementing higher layers, using or switching between multiple RATs (Radio Access Technology), supporting regulations in each country, data acquisition, distribution, database management, and LTE or NR V2X platform. It is expected that the usage method will be examined.
  • RATs Radio Access Technology
  • the communication device is mounted on the vehicle, but the embodiment of the present invention is not limited to the embodiment.
  • the communication device may be a terminal held by a person, the communication device may be a device mounted on a drone or an aircraft, and the communication device may be a base station, an RSU, a relay station (relay node), or the like. It may be a terminal or the like having a scheduling ability.
  • SL may be distinguished based on any or combination of UL (Uplink) or DL (Downlink) and the following 1) -4). Further, SL may have another name. 1) Time domain resource allocation 2) Frequency domain resource allocation 3) Reference synchronization signal (including SLSS (Sidelink Synchronization Signal)) 4) Reference signal used for path loss measurement for transmission power control
  • SL or UL OFDM Orthogonal Frequency Division Multiplexing
  • CP-OFDM Cyclic-Prefix OFDM
  • DFT-S-OFDM Discrete Fourier Transform-Spread-OFDM
  • Transform Precoded OFDM Transferformed Any of the above OFDM may be applied.
  • Mode 3 and Mode 4 are specified regarding the allocation of SL resources to the terminal 20.
  • transmission resources are dynamically allocated by DCI (Downlink Control Information) transmitted from the base station 10 to the terminal 20.
  • DCI Downlink Control Information
  • SPS SemiPersistent Scheduling
  • Mode 4 the terminal 20 autonomously selects a transmission resource from the resource pool.
  • the slot in the embodiment of the present invention may be read as a symbol, a mini slot, a subframe, a wireless frame, and a TTI (Transmission Time Interval).
  • the cell in the embodiment of the present invention may be read as a cell group, a carrier component, a BWP, a resource pool, a resource, a RAT (Radio Access Technology), a system (including a wireless LAN), or the like.
  • FIG. 2 is a diagram for explaining an example (1) of the transmission mode of V2X.
  • the base station 10 transmits the sidelink scheduling to the terminal 20A.
  • the terminal 20A transmits the PSCCH (Physical Sidelink Control Channel) and the PSCH (Physical Sidelink Shared Channel) to the terminal 20B based on the received scheduling (step 2).
  • the transmission mode of the side link communication shown in FIG. 2 may be referred to as the side link transmission mode 3 in LTE.
  • LTE sidelink transmission mode 3 Uu-based sidelink scheduling is performed.
  • Uu is a wireless interface between UTRAN (Universal Terrestrial Radio Access Network) and UE (User Equipment).
  • the transmission mode of the side link communication shown in FIG. 2 may be referred to as the side link transmission mode 1 in NR.
  • FIG. 3 is a diagram for explaining an example (2) of the transmission mode of V2X.
  • terminal 20A transmits PSCCH and PSCH to terminal 20B using autonomously selected resources.
  • the transmission mode of the side link communication shown in FIG. 3 may be referred to as the side link transmission mode 4 in LTE.
  • the UE In the side link transmission mode 4 in LTE, the UE itself executes resource selection.
  • FIG. 4 is a diagram for explaining an example (3) of the transmission mode of V2X.
  • terminal 20A transmits PSCCH and PSCH to terminal 20B using autonomously selected resources.
  • terminal 20B uses autonomously selected resources to transmit PSCCH and PSCH to terminal 20A (step 1).
  • the transmission mode of the side link communication shown in FIG. 4 may be referred to as the side link transmission mode 2a in NR.
  • the terminal 20 In the side link transmission mode 2 in NR, the terminal 20 itself executes resource selection.
  • FIG. 5 is a diagram for explaining an example (4) of the transmission mode of V2X.
  • the base station 10 transmits the side link grant to the terminal 20A via the RRC (Radio Resource Control) setting.
  • the terminal 20A transmits the PSCH to the terminal 20B based on the received resource pattern (step 1).
  • the transmission mode of the side link communication shown in FIG. 5 may be referred to as the side link transmission mode 2c in NR.
  • FIG. 6 is a diagram for explaining an example (5) of the transmission mode of V2X.
  • the terminal 20A transmits the sidelink scheduling to the terminal 20B via the PSCCH.
  • the terminal 20B transmits the PSCH to the terminal 20A based on the received scheduling (step 2).
  • the transmission mode of the side link communication shown in FIG. 6 may be referred to as the side link transmission mode 2d in NR.
  • FIG. 7 is a diagram for explaining an example (1) of the communication type of V2X.
  • the sidelink communication type shown in FIG. 7 is unicast.
  • Terminal 20A transmits PSCCH and PSCH to terminal 20.
  • the terminal 20A unicasts to the terminal 20B and also unicasts to the terminal 20C.
  • FIG. 8 is a diagram for explaining an example (2) of the communication type of V2X.
  • the sidelink communication type shown in FIG. 8 is group cast.
  • Terminal 20A transmits PSCCH and PSCH to the group to which one or more terminals 20 belong.
  • the group includes a terminal 20B and a terminal 20C, and the terminal 20A performs a group cast to the group.
  • FIG. 9 is a diagram for explaining an example (3) of the communication type of V2X.
  • the sidelink communication type shown in FIG. 9 is broadcast.
  • Terminal 20A transmits PSCCH and PSCH to one or more terminals 20.
  • terminal 20A broadcasts to terminal 20B, terminal 20C and terminal 20D.
  • the terminal 20A shown in FIGS. 7 to 9 may be referred to as a header UE.
  • HARQ will be supported for side link unicast and group cast in NR-V2X.
  • SFCI Segment Feedback Control Information
  • PSFCH Physical Sidelink Feedback Channel
  • PSFCH is used in the transmission of HARQ-ACK on the side link, but this is an example.
  • PSCCH may be used to transmit HARQ-ACK on the side link
  • PSCH may be used to transmit HARQ-ACK on the side link
  • other channels may be used. It may be used to transmit HARQ-ACK on the side link.
  • HARQ-ACK all the information reported by the terminal 20 in HARQ will be referred to as HARQ-ACK.
  • This HARQ-ACK may be referred to as HARQ-ACK information.
  • a codebook applied to the HARQ-ACK information reported from the terminal 20 to the base station 10 or the like is called a HARQ-ACK codebook.
  • the HARQ-ACK codebook defines a bit string of HARQ-ACK information.
  • NACK is also transmitted by "HARQ-ACK".
  • FIG. 10 is a diagram showing an example of the configuration and operation of the wireless communication system.
  • the wireless communication system according to the embodiment of the present invention includes a base station 10, a terminal 20A, and a terminal 20B.
  • FIG. 10 shows terminals 20A and terminals 20B as examples.
  • terminal 20 terminal 20
  • terminal 20B terminal 20
  • user device terminal 20
  • FIG. 10 shows a case where both the terminal 20A and the terminal 20B are within the coverage of the cell as an example, the operation in the embodiment of the present invention can be applied even when the terminal 20B is out of the coverage.
  • the terminal 20 is a device mounted on a vehicle such as an automobile, and has a cellular communication function as a UE in LTE or NR and a side link function. There is.
  • the terminal 20 may be a general mobile terminal (smartphone or the like). Further, the terminal 20 may be an RSU.
  • the RSU may be a UE type RSU having a UE function or a gNB type RSU having a base station device function.
  • the terminal 20 does not have to be a device in one housing. For example, even when various sensors are dispersedly arranged in the vehicle, the device including the various sensors is the terminal 20.
  • the processing content of the transmission data of the side link of the terminal 20 is basically the same as the processing content of UL transmission in LTE or NR.
  • the terminal 20 scrambles and modulates the code word of the transmission data to generate complex-valued symbols, maps the complex-valued symbols (transmission signal) to one or two layers, and performs precoding. Then, precoded complex-valued symbols are mapped to resource elements to generate a transmission signal (example: complex-valued time-domain SC-FDMA signal), which is transmitted from each antenna port.
  • the base station 10 has a cellular communication function as a base station in LTE or NR, and a function for enabling communication of the terminal 20 in the present embodiment (example: resource pool setting, resource allocation, etc.). have.
  • the base station 10 may be an RSU (gNB type RSU).
  • the signal waveform used by the terminal 20 for SL or UL may be OFDMA, SC-FDMA, or other signal waveform. It may be.
  • step S101 the base station 10 performs SL scheduling by sending DCI (Downlink Control Information) to the terminal 20A by PDCCH.
  • DCI Downlink Control Information
  • the DCI for SL scheduling will be referred to as SL scheduling DCI.
  • step S101 it is assumed that the base station 10 also transmits DCI for DL scheduling (which may be called DL allocation) to the terminal 20A by PDCCH.
  • DCI for DL scheduling (which may be called DL allocation)
  • the DCI for DL scheduling will be referred to as DL scheduling DCI.
  • the terminal 20A that has received the DL scheduling DCI receives the DL data by PDSCH using the resource specified by the DL scheduling DCI.
  • step S102 and step S103 the terminal 20A transmits SCI (Sidelink Control Information) by PSCCH and SL data by PSCH using the resource specified by SL scheduling DCI.
  • SCI Servicelink Control Information
  • SL scheduling DCI only PSCH resources may be specified.
  • the terminal 20A may transmit the SCI (PSCCH) with the same time resource as the PSCH time resource and using the frequency resource adjacent to the PSCH frequency resource.
  • the terminal 20B receives the SCI (PSCCH) and SL data (PSSCH) transmitted from the terminal 20A.
  • the SCI received by the PSCCH includes information on the PSFCH resource for the terminal 20B to transmit the HARQ-ACK for receiving the data.
  • the resource information is included in the DL scheduling DCI or SL scheduling DCI transmitted from the base station 10 in step S101, and the terminal 20A acquires the resource information from the DL scheduling DCI or SL scheduling DCI and SCI. Include in. Alternatively, the DCI transmitted from the base station 10 may not include the information of the resource, and the terminal 20A may autonomously include the information of the resource in the SCI and transmit the information.
  • step S104 the terminal 20B transmits HARQ-ACK for the received data to the terminal 20A using the resource of the PSFCH specified by the received SCI.
  • the terminal 20A is, for example, a PUCCH resource designated by the DL scheduling DCI (or the SL scheduling DCI) at the timing specified by the DL scheduling DCI (or SL scheduling DCI) (for example, slot unit timing).
  • the HARQ-ACK is transmitted using the above, and the base station 10 receives the HARQ-ACK.
  • the HARQ-ACK codebook may include HARQ-ACK received from the terminal 20B and HARQ-ACK for DL data. However, HARQ-ACK for DL data is not included when DL data is not assigned.
  • FIG. 11 is a diagram showing an example (1) of the configuration and operation of the wireless communication system according to the embodiment of the present invention.
  • the acquisition of the channel state may be executed by the terminal 20 measuring SL-CSI-RS (Sidelink Channel State Information Reference Signal).
  • SL-CSI-RS Segment Channel State Information Reference Signal
  • step S201 shown in FIG. 11 the terminal 20A transmits an SL-CSI request (request) for acquiring the channel state of the side link to the terminal 20B together with the SL-CSI-RS. Subsequently, the terminal 20B transmits the SL-CSI report (report) to the terminal 20A via the PSSCH (S202). The SL-CSI report may be transmitted to the base station 10 that schedules the side link.
  • step S202 when HARQ control is supported, the PSFCH corresponding to the PSSCH transmitted by the terminal 20B is transmitted from the terminal 20A to the terminal 20B.
  • PSFCH transmission and PSFCH reception overlap valid PSFCH transmission or PSFCH reception is selected based on the priority. It may be based on the PSCCH and PSSCH priorities associated with the PSFCH.
  • N valid PSFCH transmissions are selected based on the priority. It may be based on the PSCCH and PSSCH priorities associated with the PSFCH. N may be predetermined or may be set from the base station 10.
  • the information bits of the HARQ response may be multiplexed and transmitted by the PSFCH, or N pieces to be valid based on the priority.
  • a HARQ response may be selected. It may be based on the PSCCH and PSSCH priorities associated with the PSFCH.
  • N may be predetermined or may be set from the base station 10.
  • N may be 1 or N may be 2 or more.
  • PSFCH transmission and PSFCH reception overlap only PSFCH transmission or PSFCH reception can be executed due to the limitation of half-duplex communication.
  • PSFCH transmissions overlap each other if a plurality of PSFCHs are transmitted at the same time, a larger MPR (Maximum Power Reduction) may be applied.
  • MPR Maximum Power Reduction
  • different HARQ response control may be applied at the time of SL-CSI reporting and at the time of transport block transmission.
  • the HARQ response corresponding to PSSCH with SL-CSI may or may not be generated.
  • FIG. 12 is a diagram showing an example (2) of the configuration and operation of the wireless communication system according to the embodiment of the present invention.
  • a HARQ response corresponding to a PSSCH that includes SL-CSI and does not include SL-SCH (Sidelink Shared Channel) (“SL-SCH” and “transport block” may be replaced with each other). , It does not have to be generated or it does not have to be transmitted.
  • step S301 the terminal 20A transmits the SL-CSI request for acquiring the channel state of the side link to the terminal 20B together with the SL-CSI-RS.
  • the SL-CSI request and the SL-CSI-RS may be transmitted to the terminal 20B at different timings (for example, different slots).
  • SL-CSI-RS may be replaced with another signal (for example, DM-RS (De-Modulation Reference Signal)).
  • the terminal 20B transmits the SL-CSI report without the SL-SCH to the terminal 20A via the PSSCH (S302).
  • the terminal 20A When the terminal 20A receives the SL-CSI report without the SL-SCH via the PSSCH, the terminal 20A does not have to transmit the HARQ response to the terminal 20B in step S303. On the other hand, when the terminal 20A receives the SL-CSI report accompanied by the SL-SCH via the PSSCH, or receives the SL-SCH via the PSSCH, the terminal 20A transmits a HARQ response to the terminal 20B in step S303. May be good.
  • the terminal 20A may generate a corresponding HARQ response and transmit it to the terminal 20B in step S303. Further, for example, when the SCI includes a notification indicating the existence of SL-SCH, the terminal 20A may generate a corresponding HARQ response and transmit it to the terminal 20B in step S303. Further, for example, when the SCI includes a notification indicating that the SL-CSI report is included and a notification indicating that the SL-SCH does not exist, the terminal 20A does not have to transmit the HARQ response to the terminal 20B in step S303. Good.
  • the terminal 20A responds to the HARQ in step S303. Does not have to be transmitted to the terminal 20B.
  • FIG. 13 is a diagram showing an example (3) of the configuration and operation of the wireless communication system according to the embodiment of the present invention.
  • the HARQ response corresponding to PSSCH containing SL-CSI may not be generated or transmitted.
  • step S401 the terminal 20A transmits an SL-CSI request for acquiring the channel state of the side link to the terminal 20B together with the SL-CSI-RS. Subsequently, the terminal 20B transmits an SL-CSI report with SL-SCH or an SL-CSI report without SL-SCH to the terminal 20A via PSSCH (S402).
  • the terminal 20A receives the SL-CSI report with SL-SCH or the SL-CSI report without SL-SCH via PSSCH, it is not necessary to transmit the HARQ response to the terminal 20B in step S403.
  • the terminal 20A may generate a corresponding HARQ response and send it to the terminal 20B in step S403. Also, for example, if the SCI includes a notification indicating that the SL-CSI report is included, the terminal 20A does not have to transmit the HARQ response to the terminal 20B in step S403. Also, for example, if the SCI does not include a notification indicating that the SL-CSI report is not included, the terminal 20A may not send a HARQ response to the terminal 20B in step S403.
  • the PSFCH transmission can be reduced, the occurrence of a situation of half-duplex communication is reduced, and the MPR is reduced.
  • FIG. 14 is a diagram showing an example of resource allocation according to the embodiment of the present invention. Whether or not to generate a HARQ response corresponding to the SL-CSI report may be determined depending on whether or not a plurality of HARQ response bits are multiplexed and transmitted by PSFCH. In the present invention, "generating a HARQ response" and “transmitting a HARQ response” may be read as each other.
  • the PSCCH for transmitting the transport block and the PSCH including the transport block are transmitted from the terminal 20B to the terminal 20A for three slots to the terminal 20A. Further, the PSCCH for transmitting the SL-CSI report from the terminal 20B to the terminal 20A and the PSCCH including the SL-CSI report are transmitted to the terminal 20A for one slot.
  • the terminal 20A may multiplex the transport block for three slots and the 4-bit HARQ response corresponding to the SL-CSI report for one slot and transmit it to the terminal 20B via the PSFCH.
  • the HARQ response corresponding to the PSSCH including the SL-CSI report may be generated or transmitted.
  • the HARQ response corresponding to the PSSCH including the SL-CSI report may not be generated or transmitted.
  • the HARQ response corresponding to the SL-CSI report can be executed.
  • the HARQ response corresponding to the SL-CSI report may be generated or transmitted.
  • the HARQ response corresponding to the SL-CSI report may be generated or transmitted.
  • PSCCH with SL-CSI reporting and PSFCH corresponding to PSCH may be assigned a lower priority than PSCCH with only the lowest priority or transport block and PSFCH corresponding to PSCH.
  • PSFCHs corresponding to PSCCH and PSCH with only SL-CSI reporting and no transport block may be assigned the lowest priority, and PSCCH and PSCH with SL-CSI reporting and transport block may be assigned the lowest priority. It may be assigned a lower priority than the corresponding PSFCH, or it may be assigned a lower priority than the PSCCH with only the transport block and the PSFCH corresponding to the PSSCH.
  • PSCCH with SL-CSI reporting and PSFCH corresponding to PSSCH may be assigned a priority associated with the SL-CSI reporting setting.
  • the SL-CSI reporting setting may be associated with a priority.
  • PSCCH with SL-CSI reporting and not SL-SCH and PSFCH corresponding to PSSCH may be assigned a priority associated with the SL-CSI reporting setting. That is, the SL-CSI reporting setting may be associated with a priority.
  • the HARQ response corresponding to the SL-CSI report is generated only if the PSFCH transmitting the HARQ response corresponding to the SL-CSI report does not overlap with the PSFCH transmitting the HARQ response corresponding to the transport block. It may be sent.
  • the HARQ response corresponding to the SL-CSI report is not generated even if it is not generated. It may or may not be sent. f)
  • the terminal 20 receiving a certain PSCCH and PSCH knows that the PSCCH and PSCH include an SL-CSI report and / or a transport block. The HARQ response corresponding to the PSCCH and PSCH may not be generated or transmitted.
  • the terminal 20 receiving a certain PSCCH and PSCH does not know that the PSCCH and PSCH include an SL-CSI report and / or a transport block.
  • the HARQ response corresponding to the PSCCH and PSCH may be generated or transmitted.
  • the priority under the above conditions may be notified by SCI.
  • the SL-CSI reporting settings described above may be notified via, for example, RRC signaling.
  • the HARQ response corresponding to the transport block and the HARQ response corresponding to the SL-CSI report collide, the HARQ response corresponding to the SL-CSI report can be dropped.
  • FIG. 15 is a diagram showing an example (4) of the configuration and operation of the wireless communication system according to the embodiment of the present invention.
  • the HARQ response corresponding to the SL-CSI report may be transmitted to base station 10.
  • the terminal 20B transmits an SL-CSI report to the terminal 20A with a PSCH containing or not including a transport block, and then transmits an ACK (acceptable response) to the base station 10 as a HARQ response corresponding to the PSCH. May be good.
  • "PSSCH" and "SL resource” may be read as each other.
  • step S501 the terminal 20A transmits the SL-CSI request for acquiring the channel state of the side link to the terminal 20B together with the SL-CSI-RS. Subsequently, the terminal 20B transmits an SL-CSI report with SL-SCH or an SL-CSI report without SL-SCH to the terminal 20A via PSSCH (S502).
  • the terminal 20A receives the SL-CSI report with SL-SCH or the SL-CSI report without SL-SCH via PSSCH, it is not necessary to transmit the HARQ response to the terminal 20B in step S503.
  • the terminal 20B may transmit an ACK to the base station 10.
  • the terminal 20B may transmit an ACK to the base station 10 as a HARQ response corresponding to the SL resource via PUCCH or PUSCH even when the HARQ response corresponding to the SL-CSI report is not received.
  • the content of the HARQ response may be changed depending on whether or not the terminal 20B receives or re-receives the SL-CSI request. For example, if the terminal 20B receives or re-receives the SL-CSI request within a predetermined period from the time of step S502, the terminal 20B NACK (negative response) as a HARQ response corresponding to the SL resource via PUCCH or PUSCH. ) May be transmitted to the base station 10.
  • the terminal 20B receives or re-receives the SL-CSI request, and transmits the HARQ response to the base station 10 from the time when the SL-CSI request is received or re-received. If the gap to is sufficient (eg, the gap is greater than the threshold X), the terminal 20B may transmit NACK to the base station 10 via PUCCH or PUSCH as a HARQ response corresponding to the SL resource.
  • step S502 when the terminal 20B does not receive or re-receive the SL-CSI request and a predetermined period elapses, the terminal 20B bases ACK as a HARQ response corresponding to the SL resource via PUCCH or PUSCH. It may be transmitted to the station 10.
  • the content of the HARQ response corresponding to the SL-CSI report transmitted to the first SL-CSI request may be changed to NACK. ..
  • the UE operation related to the HARQ response to the base station 10 corresponding to the SL-CSI report is clearly defined. can do.
  • the HARQ response described with reference to FIG. 15 does not have to be transmitted to the base station 10. By not transmitting the HARQ response to the base station 10, the traffic can be further reduced.
  • Whether or not the HARQ response corresponding to the SL-CSI report is generated and transmitted may be determined depending on the transmission mode or the resource allocation mode. For example, in the case of transmission mode 1, the above conditions a) -f) may be applied. Further, for example, in the case of the transmission mode 2, the method of not generating or transmitting the PSFCH described with reference to FIGS. 12, 13 and 14 may be applied.
  • Whether or not the corresponding HARQ response for the SL-CSI report is generated and transmitted may be determined depending on whether the HARQ response to the base station 10 is valid or invalid. For example, if the HARQ response to the base station 10 is valid, the above conditions a) -f) may be applied. Further, for example, when the HARQ response to the base station 10 is invalid, the method of not generating or transmitting the PSFCH described with reference to FIGS. 12, 13 and 14 may be applied.
  • the terminal 20 can reduce the HARQ response corresponding to the SL-CSI report depending on the communication situation. Further, the terminal 20 can give a priority according to the communication status to the HARQ response corresponding to the SL-CSI report. Further, the terminal 20 can report the HARQ response corresponding to the SL-CSI report to the base station 10 without receiving the PSFCH, depending on the communication status.
  • retransmission control can be determined according to the communication status.
  • the base station 10 and the terminal 20 include a function of carrying out the above-described embodiment.
  • the base station 10 and the terminal 20 may each have only a part of the functions in the embodiment.
  • FIG. 16 is a diagram showing an example of the functional configuration of the base station 10.
  • the base station 10 includes a transmission unit 110, a reception unit 120, a setting unit 130, and a control unit 140.
  • the functional configuration shown in FIG. 16 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
  • the transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly.
  • the receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring information of, for example, a higher layer from the received signals. Further, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signal, DL reference signal and the like to the terminal 20.
  • the setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in the storage device, and reads the setting information from the storage device as needed.
  • the content of the setting information is, for example, information related to the setting of D2D communication.
  • the control unit 140 performs processing related to the setting for the terminal 20 to perform D2D communication. Further, the control unit 140 transmits the scheduling of D2D communication and DL communication to the terminal 20 via the transmission unit 110. Further, the control unit 140 receives information related to the HARQ response of the D2D communication and the DL communication from the terminal 20 via the reception unit 120. Further, the control unit 140 receives the CSI report related to the D2D communication from the terminal 20 via the reception unit 120.
  • the function unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the function unit related to signal reception in the control unit 140 may be included in the reception unit 120.
  • FIG. 17 is a diagram showing an example of the functional configuration of the terminal 20.
  • the terminal 20 has a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240.
  • the functional configuration shown in FIG. 17 is only an example. Any function classification and name of the functional unit may be used as long as the operation according to the embodiment of the present invention can be executed.
  • the transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal.
  • the receiving unit 220 wirelessly receives various signals and acquires a signal of a higher layer from the received signal of the physical layer. Further, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signal, reference signal and the like transmitted from the base station 10. Further, for example, the transmission unit 210 connects the other terminal 20 to PSCCH (Physical Sidelink Control Channel), PSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel) as D2D communication. Etc., and the receiving unit 220 receives the PSCCH, PSCH, PSDCH, PSBCH, etc. from the other terminal 20.
  • PSCCH Physical Sidelink Control Channel
  • PSCH Physical Sidelink Shared Channel
  • PSDCH Physical Sidelink Discovery Channel
  • PSBCH Physical Side
  • the setting unit 230 stores various setting information received from the base station 10 or the terminal 20 by the receiving unit 220 in the storage device, and reads it out from the storage device as needed.
  • the setting unit 230 also stores preset setting information.
  • the content of the setting information is, for example, information related to the setting of D2D communication.
  • the control unit 240 controls D2D communication with another terminal 20 as described in the embodiment.
  • the control unit 240 performs processing related to HARQ of D2D communication and DL communication.
  • the control unit 240 transmits information related to the HARQ response of the D2D communication and the DL communication from the base station 10 to the other terminal 20 scheduled to the base station 10.
  • the control unit 240 may schedule D2D communication to another terminal 20.
  • the control unit 240 transmits the CSI request related to the D2D communication to the terminal 20 together with the SL-CSI-RS via the transmission unit 210.
  • the control unit 240 transmits the CSI report related to the D2D communication to the terminal 20 or the base station 10 via the transmission unit 210.
  • the function unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the function unit related to signal reception in the control unit 240 may be included in the reception unit 220.
  • each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by two or more devices that are physically or logically separated). , Wired, wireless, etc.) and may be realized using these plurality of devices.
  • the functional block may be realized by combining the software with the one device or the plurality of devices.
  • Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption. Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but limited to these I can't.
  • a functional block (constituent unit) that functions transmission is called a transmitting unit (transmitting unit) or a transmitter (transmitter).
  • transmitting unit transmitting unit
  • transmitter transmitter
  • the base station 10, the terminal 20, and the like in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure.
  • FIG. 18 is a diagram showing an example of the hardware configuration of the base station 10 and the terminal 20 according to the embodiment of the present disclosure.
  • the above-mentioned base station 10 and terminal 20 are physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. May be good.
  • the word “device” can be read as a circuit, device, unit, etc.
  • the hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
  • the processor 1001 For each function of the base station 10 and the terminal 20, the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the storage device 1002, and controls the communication by the communication device 1004. It is realized by controlling at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
  • Processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be composed of a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic unit, a register, and the like.
  • CPU Central Processing Unit
  • control unit 140, control unit 240, and the like may be realized by the processor 1001.
  • the processor 1001 reads a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes according to these.
  • a program program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used.
  • the control unit 140 of the base station 10 shown in FIG. 16 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
  • the control unit 240 of the terminal 20 shown in FIG. 17 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
  • Processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from the network via a telecommunication line.
  • the storage device 1002 is a computer-readable recording medium, for example, by at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. It may be configured.
  • the storage device 1002 may be referred to as a register, a cache, a main memory (main storage device), or the like.
  • the storage device 1002 can store a program (program code), a software module, or the like that can be executed to implement the communication method according to the embodiment of the present disclosure.
  • the auxiliary storage device 1003 is a computer-readable recording medium, and is, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, an optical magnetic disk (for example, a compact disk, a digital versatile disk, Blu).
  • -It may be composed of at least one of a ray (registered trademark) disk), a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like.
  • the storage medium described above may be, for example, a database, server or other suitable medium containing at least one of the storage device 1002 and the auxiliary storage device 1003.
  • the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex). It may be composed of.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the transmission / reception unit may be physically or logically separated from each other in the transmission unit and the reception unit.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
  • the base station 10 and the terminal 20 are hardware such as a microprocessor, a digital signal processor (DSP: Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured to include, and a part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented using at least one of these hardware.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the transmission unit that transmits the reference signal used for the CSI (Channel State Information) request and the CSI measurement to another terminal, and the measurement result of the reference signal.
  • a terminal having a receiving unit that receives a CSI report based on the CSI report from the other terminal and a control unit that determines control related to a HARQ (Hybrid automatic repeat request) response corresponding to the CSI report according to a communication status is provided. ..
  • the terminal 20 can reduce the HARQ response corresponding to the SL-CSI report depending on the communication status. Further, the terminal 20 can give a priority according to the communication status to the HARQ response corresponding to the SL-CSI report. That is, in the direct communication between terminals, the retransmission control can be determined according to the communication status.
  • the control unit does not have to transmit the HARQ response to the other terminal when the receiving unit does not receive the transport block together with the CSI report.
  • the terminal 20 can reduce the HARQ response that the SL-CSI report corresponds to when the need is low.
  • the control unit may transmit the HARQ response corresponding to the CSI report to the other terminal via the channel.
  • the terminal 20 can reduce the HARQ response corresponding to the SL-CSI report when the effect of the required additional resources is small.
  • the control unit may set the priority of the channel that transmits the HARQ response corresponding to the CSI report to be lower than the priority of the channel that transmits the HARQ response corresponding to the transport block. With this configuration, the terminal 20 can give priority to the HARQ response corresponding to the SL-CSI report as needed.
  • the receiving unit that receives the reference signal used for the CSI (Channel State Information) request and the CSI measurement from another terminal, and the CSI report based on the measurement result of the reference signal are described above.
  • a terminal having a transmission unit for transmitting to another terminal and a control unit for transmitting a HARQ (Hybrid automatic repeat request) response corresponding to the CSI report to a base station is provided.
  • CSI Channel State Information
  • the terminal 20 can report the HARQ response corresponding to the SL-CSI report to the base station 10 without receiving the PSFCH, depending on the communication status. That is, in the direct communication between terminals, the retransmission control can be determined according to the communication status.
  • control unit If the control unit does not receive the CSI request within a certain period of time from the time when the transmission unit transmits the CSI report to the other terminal, the control unit transmits a positive response to the base station. If a CSI request is received within a certain period of time from the time when the transmitting unit transmits the CSI report to the other terminal, a negative response may be transmitted to the base station. With this configuration, the terminal 20 can report the HARQ response corresponding to the SL-CSI report to the base station 10 without receiving the PSFCH, depending on the communication status.
  • the boundary of the functional unit or the processing unit in the functional block diagram does not always correspond to the boundary of the physical component.
  • the operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components.
  • the processing order may be changed as long as there is no contradiction.
  • the base station 10 and the terminal 20 have been described with reference to functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof.
  • the software operated by the processor of the base station 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are random access memory (RAM), flash memory, and read-only memory, respectively. It may be stored in (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
  • information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, etc. Broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof may be used.
  • RRC signaling may be referred to as an RRC message, for example, RRC. It may be a connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
  • Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), and 5G (5th generation mobile communication).
  • system FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)) )), LTE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth®, and other systems that utilize suitable systems and have been extended based on these. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
  • the specific operation performed by the base station 10 in the present specification may be performed by its upper node.
  • various operations performed for communication with the terminal 20 are performed by the base station 10 and other network nodes other than the base station 10 (for example, it is clear that it can be done by at least one of (but not limited to, MME, S-GW, etc.).
  • the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW). ..
  • the information, signals, etc. described in the present disclosure can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
  • the input / output information and the like may be stored in a specific location (for example, memory) or may be managed using a management table. Input / output information and the like can be overwritten, updated, or added. The output information and the like may be deleted. The input information or the like may be transmitted to another device.
  • the determination in the present disclosure may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example,). , Comparison with a predetermined value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language, or by any other name, is an instruction, instruction set, code, code segment, program code, program, subprogram, software module.
  • Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • a transmission medium For example, a website that uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: Digital Subscriber Line), etc.) and wireless technology (infrared, microwave, etc.) When transmitted from a server, or other remote source, at least one of these wired and wireless technologies is included within the definition of transmission medium.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
  • a channel and a symbol may be a signal (signaling).
  • the signal may be a message.
  • the component carrier CC: Component Carrier
  • CC Component Carrier
  • system and “network” used in this disclosure are used interchangeably.
  • the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented.
  • the radio resource may be indexed.
  • base station Base Station
  • radio base station base station
  • base station fixed station
  • NodeB nodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • access point “ transmission point ”,“ reception point ”,“ transmission / reception point ”,“ cell ”,“ sector ”,“ Terms such as “cell group”, “carrier”, and “component carrier” can be used interchangeably.
  • Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
  • the base station can accommodate one or more (for example, three) cells.
  • a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH:)).
  • Communication services can also be provided by Remote Radio Head).
  • the term "cell” or “sector” is a part or all of the coverage area of at least one of the base station and the base station subsystem that provides the communication service in this coverage. Point to.
  • MS Mobile Station
  • UE User Equipment
  • Mobile stations can be subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless, depending on the trader. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
  • the moving body may be a vehicle (for example, a car, an airplane, etc.), an unmanned moving body (for example, a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned type). ) May be.
  • at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
  • at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read by the user terminal.
  • the communication between the base station and the user terminal is replaced with the communication between a plurality of terminals 20 (for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.).
  • D2D Device-to-Device
  • V2X Vehicle-to-Everything
  • Each aspect / embodiment of the present disclosure may be applied to the configuration.
  • the terminal 20 may have the function of the base station 10 described above.
  • words such as "up” and “down” may be read as words corresponding to inter-terminal communication (for example, "side”).
  • an uplink channel, a downlink channel, and the like may be read as a side channel.
  • the user terminal in the present disclosure may be read as a base station.
  • the base station may have the functions of the above-mentioned user terminal.
  • determining and “determining” used in this disclosure may include a wide variety of actions.
  • “Judgment” and “decision” are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). (For example, searching in a table, database or another data structure), ascertaining may be regarded as “judgment” or “decision”.
  • judgment and “decision” are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access.
  • Accessing (for example, accessing data in memory) may be regarded as "judgment” or “decision”.
  • judgment and “decision” mean that the things such as solving, selecting, choosing, establishing, and comparing are regarded as “judgment” and “decision”. Can include. That is, “judgment” and “decision” may include considering some action as “judgment” and “decision”. Further, “judgment (decision)” may be read as “assuming”, “expecting”, “considering” and the like.
  • connection means any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two “connected” or “combined” elements.
  • the connection or connection between the elements may be physical, logical, or a combination thereof.
  • connection may be read as "access”.
  • the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain. Can be considered to be “connected” or “coupled” to each other using electromagnetic energies having wavelengths in the microwave and light (both visible and invisible) regions.
  • the reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot (Pilot) depending on the applicable standard.
  • RS Reference Signal
  • Pilot Pilot
  • references to elements using designations such as “first” and “second” as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted, or that the first element must somehow precede the second element.
  • each of the above devices may be replaced with a "part”, a “circuit”, a “device”, or the like.
  • the wireless frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe. Subframes may further consist of one or more slots in the time domain.
  • the subframe may have a fixed time length (eg, 1 ms) that does not depend on numerology.
  • the numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel.
  • Numerology includes, for example, subcarrier spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, wireless frame configuration, and transmitter / receiver.
  • SCS subcarrier spacing
  • TTI Transmission Time Interval
  • At least one of a specific filtering process performed in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
  • the slot may be composed of one or more symbols in the time domain (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.). Slots may be in time units based on numerology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain.
  • the mini-slot may also be referred to as a sub-slot.
  • a minislot may consist of a smaller number of symbols than the slot.
  • PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A.
  • the PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.
  • the wireless frame, subframe, slot, minislot and symbol all represent the time unit when transmitting a signal.
  • the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
  • one subframe may be called a transmission time interval (TTI)
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI slot or one minislot
  • You may. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. It may be.
  • the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
  • the base station schedules each terminal 20 to allocate radio resources (frequency bandwidth that can be used in each terminal 20, transmission power, etc.) in TTI units.
  • the definition of TTI is not limited to this.
  • the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
  • the time interval for example, the number of symbols
  • the transport block, code block, code word, etc. may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
  • TTIs shorter than normal TTIs may be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.
  • the long TTI (for example, normal TTI, subframe, etc.) may be read as a TTI having a time length of more than 1 ms, and the short TTI (for example, shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms. It may be read as a TTI having the above TTI length.
  • the resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
  • the number of subcarriers contained in the RB may be the same regardless of the numerology, and may be, for example, 12.
  • the number of subcarriers contained in the RB may be determined based on numerology.
  • the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI.
  • Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
  • One or more RBs include a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like. May be called.
  • PRB Physical resource block
  • SCG Sub-Carrier Group
  • REG Resource Element Group
  • PRB pair an RB pair, and the like. May be called.
  • the resource block may be composed of one or a plurality of resource elements (RE: Resource Element).
  • RE Resource Element
  • 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
  • Bandwidth part (which may also be called partial bandwidth) may represent a subset of consecutive common resource blocks (RBs) for a certain neurology in a carrier.
  • the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
  • UL BWP UL BWP
  • DL BWP DL BWP
  • One or more BWPs may be set in one carrier for the terminal 20.
  • At least one of the set BWPs may be active, and the terminal 20 does not have to assume that a predetermined signal / channel is transmitted / received outside the active BWP.
  • “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
  • the above-mentioned structures such as wireless frames, subframes, slots, mini slots and symbols are merely examples.
  • the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in the RB.
  • the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be changed in various ways.
  • the term "A and B are different” may mean “A and B are different from each other”.
  • the term may mean that "A and B are different from C”.
  • Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
  • the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit one, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.
  • the HARQ response is an example of a response related to retransmission control.
  • ACK is an example of an acknowledgment.
  • NACK is an example of a negative response.
  • SL-CSI-RS is an example of a reference signal used for CSI measurement.
  • Base station 110 Transmission unit 120 Reception unit 130 Setting unit 140 Control unit 20 Terminal 210 Transmission unit 220 Reception unit 230 Setting unit 240 Control unit 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Terminal comprenant : une unité de transmission qui transmet une demande d'informations d'état de canal (CSI) et un signal de référence utilisé pour la mesure de CSI à d'autres terminaux ; une unité de réception qui reçoit, en provenance des autres terminaux, un rapport de CSI sur la base du résultat de mesure du signal de référence ; et une unité de commande qui détermine, en fonction de l'état de communication, une commande concernant une réponse à une demande de répétition automatique hybride (HARQ) qui correspond au rapport de CSI.
PCT/JP2019/035984 2019-09-12 2019-09-12 Terminal WO2021048990A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2021545061A JP7394861B2 (ja) 2019-09-12 2019-09-12 端末、通信システム及び通信方法
CN201980100170.8A CN114375591A (zh) 2019-09-12 2019-09-12 终端
PCT/JP2019/035984 WO2021048990A1 (fr) 2019-09-12 2019-09-12 Terminal
EP19945261.6A EP4030814A4 (fr) 2019-09-12 2019-09-12 Terminal
US17/637,397 US20220287044A1 (en) 2019-09-12 2019-09-12 Terminal
AU2019466108A AU2019466108A1 (en) 2019-09-12 2019-09-12 Terminal

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WO2016076301A1 (fr) * 2014-11-14 2016-05-19 株式会社Ｎｔｔドコモ Dispositif utilisateur, procédé de commande de rétroaction et procédé de commande de retransmission
WO2017022802A1 (fr) * 2015-08-06 2017-02-09 シャープ株式会社 Dispositif terminal, dispositif de station de base, procédé de communication et circuit intégré
WO2018029976A1 (fr) * 2016-08-08 2018-02-15 ソニー株式会社 Dispositif de communication, procédé de communication, et programme

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WO2019128261A1 (fr) * 2017-12-27 2019-07-04 Oppo广东移动通信有限公司 Procédé et dispositif de transmission de données, support de stockage informatique

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WO2016076301A1 (fr) * 2014-11-14 2016-05-19 株式会社Ｎｔｔドコモ Dispositif utilisateur, procédé de commande de rétroaction et procédé de commande de retransmission
WO2017022802A1 (fr) * 2015-08-06 2017-02-09 シャープ株式会社 Dispositif terminal, dispositif de station de base, procédé de communication et circuit intégré
WO2018029976A1 (fr) * 2016-08-08 2018-02-15 ソニー株式会社 Dispositif de communication, procédé de communication, et programme

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Title
3GPP TR 22.886, March 2017 (2017-03-01)
3GPP TS 36.211, June 2019 (2019-06-01)
See also references of EP4030814A4

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EP4030814A1 (fr) 2022-07-20
JPWO2021048990A1 (fr) 2021-03-18
EP4030814A4 (fr) 2023-06-14
CN114375591A (zh) 2022-04-19
US20220287044A1 (en) 2022-09-08
AU2019466108A1 (en) 2022-03-24

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